D Dorian

The D Dorian mode — D E F G A B C — shown across the guitar neck.

Swipe the neck sideways to see the higher frets.

D Dorian is the natural minor with one note changed — the 6, B. That single note is what the mode sounds like; lean on it and the colour is obvious, avoid it and you are just playing minor.

The tool shows this from its parent key, C major, with D marked as where Dorian begins, the same seven notes centered on C.